US9109138B2 - Optically clear biaxially oriented polyester film with anti-iridescent primer layer - Google Patents

Optically clear biaxially oriented polyester film with anti-iridescent primer layer Download PDF

Info

Publication number
US9109138B2
US9109138B2 US13/337,144 US201113337144A US9109138B2 US 9109138 B2 US9109138 B2 US 9109138B2 US 201113337144 A US201113337144 A US 201113337144A US 9109138 B2 US9109138 B2 US 9109138B2
Authority
US
United States
Prior art keywords
layer
polyester
composite
film
primer layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US13/337,144
Other languages
English (en)
Other versions
US20130034710A1 (en
Inventor
Tracy Paolilli
John Fitch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toray Plastics America Inc
Original Assignee
Toray Plastics America Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toray Plastics America Inc filed Critical Toray Plastics America Inc
Priority to US13/337,144 priority Critical patent/US9109138B2/en
Assigned to TORAY PLASTICS (AMERICA), INC. reassignment TORAY PLASTICS (AMERICA), INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FITCH, JOHN, PAOLILLI, TRACY
Priority to JP2014524042A priority patent/JP6353362B2/ja
Priority to EP12820267.8A priority patent/EP2739475B1/en
Priority to PCT/US2012/049114 priority patent/WO2013019837A1/en
Priority to US13/688,181 priority patent/US20130089721A1/en
Publication of US20130034710A1 publication Critical patent/US20130034710A1/en
Priority to US14/795,276 priority patent/US9937525B2/en
Publication of US9109138B2 publication Critical patent/US9109138B2/en
Application granted granted Critical
Priority to US15/130,974 priority patent/US10294373B2/en
Active legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
    • B05D5/061—Special surface effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/53—Base coat plus clear coat type
    • B05D7/536—Base coat plus clear coat type each layer being cured, at least partially, separately
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/308—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising acrylic (co)polymers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
    • C08G18/78—Nitrogen
    • C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
    • C08G18/797—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing carbodiimide and/or uretone-imine groups
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/042—Coating with two or more layers, where at least one layer of a composition contains a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/0427—Coating with only one layer of a composition containing a polymer binder
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
    • C08J7/04—Coating
    • C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
    • C08J7/047—
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • G02B1/105—
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • G02B1/111—Anti-reflection coatings using layers comprising organic materials
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/14—Protective coatings, e.g. hard coatings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/12—Photovoltaic modules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2590/00—Signboards, advertising panels, road signs
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2475/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2475/04—Polyurethanes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • Y10T428/24967—Absolute thicknesses specified
    • Y10T428/24975—No layer or component greater than 5 mils thick
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y10T428/264—Up to 3 mils
    • Y10T428/265—1 mil or less

Definitions

  • the present disclosure is generally related to optically clear biaxially oriented polyester film with at least one primer layer, having excellent adhesive properties to acrylic coating material over the primer layer even under harsh conditions, such as high moisture environment.
  • the polyester film also reduces iridescent appearance after the polyester film is coated with acrylic material such as hard coating.
  • the polyester film may have UV blocking and weatherable properties and may be preferably used for window film, display film, outside clear label, outside signage and photo voltaic application.
  • biaxially oriented polyester films are serving as component of many articles such as food packaging, printing media, electrical insulation, optical and the other industrial uses.
  • the thermal stability, dimensional stability, chemical resistance, relative high surface energy, optical clarity as well as cost effectiveness of biaxially oriented polyester films are beneficial for typical end use applications.
  • biaxially oriented polyster films can be used for instance as a substrate of optical products such as window films, display parts, touch screen, eyewear, including visors, goggles, and spectacles, lenses, sunscreens, labels and photovoltaic materials.
  • applications will involve placing optically clear acrylic coating material onto the biaxially oriented polyester films.
  • the composite film of biaxially oriented polyester film coated with acrylic material can have adverse optical properties.
  • the film can exhibit excessive iridescence.
  • the refractive index (“RI”) of an acrylic coating material can be different from the RI of a biaxially oriented polyester film, e.g. biaxially polyethylene terephthalate (PET) film that is about 1.66.
  • PET biaxially polyethylene terephthalate
  • the difference between these refractive indices causes optical interference of light rays reflected from the surface between the acrylic layer and the polyester layer. This interference produces a rippled iridescent appearance through the spectral reflectance of the acrylic material-coated polyester film. Iridescence on the acrylic material coated polyester film is very evident under spectral light of fluorescent lamps because such light has a sharp distribution of luminescence that interferes with the rippled spectral reflectance of the acrylic material coated polyester film.
  • Iridescence is reduced or does not occur if the film is hazy because light is scattered. Hazy film is not desirable for many optically clear end use applications. Furthermore, the use of fluorescent lighting in place of incandescent lighting is increasing due energy conservation efforts. Consequently, the iridescence of the acrylic material-coated polyester film can distort or block the view through the film or detract from the desired aesthetic appearance of the article comprising the film. Accordingly, the ability to reduce iridescence is gaining importance.
  • polyester-coated polyester films Another problem with the acrylic material-coated polyester films is adhesion between layers of acrylic material and the polyester layer.
  • biaxially oriented polyester film has highly crystallized surface that makes the polyester difficult to adhere to such acrylic material coating layer.
  • a primer layer is sometimes used between polyester and acrylic polymer layers to improve adhesion.
  • Japanese Patent Publication Number JP 2004-299101 of YOKOTA SUNAO et al. entitled “Transparent Laminated Film for Surface Protection” is directed to a transparent composite film with a 10-250 ⁇ m thick base layer of biaxially stretched polyester and a 3-20 ⁇ m thick hard coat layer of acrylic polymer providing at least 90% light transmission.
  • the film is for laminating to a surface of an article, such as a flat panel display member, a nameplate, a window and the like, to protect the article from scratching or other damage.
  • US patent application 2008/0038539 of Yokota et al. discloses a composite film having a core layer sandwiched between outer layers to form a base polyester layer.
  • a coating layer containing anti-iridescent material covers one side of the base polyester layer and an acrylic coating is disposed over the anti-iridescent coating layer.
  • U.S. '539 discloses the effect achieving anti-iridescence by optimizing RI and the coating layer thickness to minimize infringement of reflection light which causes ripples of the spectral reflectance.
  • This invention relates to a highly optically clear, composite film having a predominantly thermoplastic polyester base layer and a primer layer of a polyester and polyurethane blend composition.
  • the base layer preferably has an A/B/C layered structure with a substantially particle-free core layer B of polyester and outer layers A and C of polyester containing nonpolyester, organic and/or inorganic particles.
  • the primer layer is preferably applied to the base layer from solution that is organic solvent-free and is crosslinked using a carbodiimide crosslinking agent.
  • the primer layer and base layer composite can be laminated with a protective layer of primarily acrylic polymer, for example to obtain a solar control film.
  • Various layers of the composite and solar control films can contain effective amounts of functional additives, such as UV light blockers.
  • Polyurethane in the primer especially in combination with crosslinking by the carbodiimide, provides the acrylic coated polyester base solar control film with notably reduced iridescence and durable adhesion between polyester and acrylic layers in moist and warm service conditions.
  • FIG. 1 is an elevation cross section view of a composite film according to an embodiment of this invention.
  • FIG. 2 is an elevation cross section view of a solar control film including the composite film of FIG. 1 and a protective layer according to another embodiment of this invention.
  • FIG. 1 A basic embodiment of this invention is understood with reference to FIG. 1 showing a cross section of novel composite film 10 .
  • This composite film includes a base layer 5 and a primer layer 2 .
  • the base layer is preferably formed of three sublayers, namely core layer 6 , and outer layers 4 and 8 .
  • Each of the core and outer layers is predominantly polyester and can include other components, such as “UV” (ultraviolet light) blocking additives and particles.
  • a solar film 20 includes a protective layer 9 primarily of preferably an acrylic polymer. The protective layer 9 is positioned on the composite film in contact with the primer layer 2 .
  • the primer layer contains polymeric binder as a major component of the primer layer.
  • the polymeric binder may be selected from, but not limited to, polyester, acrylic, polyurethane or the mixture thereof. It is preferred to select polyester binder because its RI is similar to that of the polyester base layer and thus is helpful to reduce iridescence in the manner as described in US 2008/0038539. Also the polyester binder is very compatible with the base polyester layer to provide preferred adhesion, in general.
  • a preferred raw material for the polyester binder is a 30% solids dispersion, in 2% propanol, aqueous solution commercially available under the name Eastek® 1200 (Eastman Chemicals Company, Kingsport, Tenn.). This polyester has inherent viscosity of 0.34-0.42, glass transition temperature (Tg) of 63° C. and softening point 65° C.
  • a traditional approach to reducing iridescence in composite film utilizes refractive index matching techniques.
  • the refractive indices of the acrylic material layer and the base biaxially oriented polyester film layer are distinctly different.
  • the refractive index difference generates iridescence, as mentioned above. Selecting a primer composition having a RI that matches and complements those of the two layers could reduce iridescence by canceling the effect of disparate refractive indices.
  • low iridescence from the polyurethane according to this invention is caused by a light scattering phenomenon (without increasing haze) rather than or in combination with refractive index matching. This is remarkable because the polyurethane can be utilized at a particle size and concentration low enough to allow excellent optical clarity of the overall film yet provide good anti-iridescence performance.
  • the implications of this theory include that a polyurethane fine particle dispersion in a primer layer can be utilized to reduce iridescence in a wide variety combinations of base layer and the over coating layer materials.
  • low iridescence can be obtained without constraining the primer layer to have a particular refractive index that complements the refractive indices of the other composite film layers, although the combination of the refractive index matching may be preferred.
  • the preferred iridescence-reducing component polyurethane particle is an inversely synthesized aliphatic polyurethane.
  • inversely synthesized aliphatic polyurethane means that the polyurethane is formed by a process in which (i) non-aromatic organic polyisocyanate and non-aromatic organic polyol are reacted to form a polyurethane polymer, (ii) a neutralizing agent, such as a tertiary amine, is added to water to form an aqueous solution, and then (iii) the polyurethane polymer is added to and dispersed in the aqueous neutralizing agent solution.
  • a preferred inversely produced polyurethane material is commercially available under the name Neorez R1010 (DSM NeoResins B.V., Waalwijk, Netherlands).
  • inversely synthesized aliphatic polyurethane particles interrelates successfully with several important performance parameters of optically clear and solar control films. In addition to exhibiting little or no iridescence, these films are called upon to have high cohesive strength for durability and to be highly transparent. All of these properties can be achieved by these polyurethane particles employed in a primer layer together with polymeric binder and a carbodiimide crosslinking agent in proper proportions.
  • the polymeric binder provides structural integrity and serves as matrix for the dispersed phase of polyurethane particles.
  • the crosslinking agent transforms the binder to a rigid network. If too little binder or crosslinking agent is present, the primer will be too weak to durably hold the protective layer to the base layer. Delamination can occur.
  • the polyurethane particles cancel undesirable iridescence. If too little inversely synthesized aliphatic polyurethane particles are present, iridescence can occur. Conversely, if there is too much of binder, polyurethane or crosslinking agent, or the primer layer is too thick, the film can become excessively hazy and thus unsuitable for optical or solar control film utilities.
  • the description and examples of this disclosure provide guidance for selecting relative amounts of the primer components for successful practice of this invention. The artisan of ordinary skill will be able to adjust proportions of primer components and primer layer thickness according to the principles set forth herein to effectively apply the invention without undue experimentation.
  • the desired particle size of the polyurethane particles within the primer layer is about 1 nm to about 100 nm, preferably about 1 nm to about 60 nm. If the particle size is larger than 100 nm, the coated film surface can develop a grainy appearance. Additionally, the haze value can exceed the less than 3% desired limit for the coated polyester film (i.e., the base layer/primer/acrylic polymer layer composite), thereby reducing the optical clarity. If the particle size is smaller than 1 nm, the anti-iridescing properties may not be achieved.
  • the content of the polyurethane particles in the primer layer is about 0.1 to 2.5 wt %, preferably about 0.1 to about 1.5 wt %.
  • the content is less than 0.1 wt % there may not be enough particles to effectively reduce or eliminate iridescence. If the content is more than 2.5 wt %, the coated film surface may exceed a less than 3% haze value, thereby reducing optical clarity.
  • the urethane particles are preferably uniformly dispersed within the primer layer.
  • the primer layer should be of a consistent dry coating weight and thickness with adequate unagglomerated dispersed particles to sufficiently provide an optically clear coating with a haze value.
  • Primer layer-coated base layer (i.e., without an acrylic polymer layer) of this invention has a haze value of less than 4%.
  • the preferred thickness of the primer layer is about 0.03 to 0.15 ⁇ m, more preferably, 0.07 to 0.12 ⁇ m. If the thickness is less than 0.03 ⁇ m, the desired adhesiveness and anti-iridescence effect may not be achieved. If the thickness is more than 0.15 ⁇ m, then presence of the primer can detract from overall optical clarity and the desired anti-iridescence effect may not be achieved.
  • crosslinking strengthens the primer layer by forming the polymeric binder component of the primer layer into a permanent, rigid, network structure. It also produces chemical links between the polymeric binder and the polyester base layer. Crosslinking can be accomplished during and/or after drying solvent from the wet primer layer. Typically a crosslinking agent is added to the primer composition to catalyze the reaction. Many conventional crosslinking agents for reacting polyurethane and polyester may be used, such as carbodiimide, melamine, aziridine, glyoxal, oxazoline and mixtures thereof.
  • Carbodiimides have the chemical formula R 1 N ⁇ C ⁇ NR 2 in which R 1 and R 2 are hydrogen or hydrocarbon radicals. Additional benefits of using carbodimide crosslinker include improved adhesive bonding of film layers, useful potlife, low toxicity, improved chemical resistance and crosslinking at ambient conditions.
  • a preferred carbodiimide crosslinking agent is Solucote® XL1 (DSM NeoResins B.V., Waalwijk, Netherlands).
  • the crosslinking agent is added to the primer coating liquid and mixed to uniform concentration.
  • the preferred content of the crosslinking agent in the primer layer is about 1 wt % to 5 wt %, more preferably, about 2 to 3 wt %. If the content is less than 1 wt %, the organic solvent resistance properties, the inorganic solvent resistance properties and the required adhesive strength of the primer layer will not be achieved. If the content is more than 5 wt %, excessive crosslinking can produce haze value of the base layer/primer layer film greater than 4%, thereby reducing optical clarity.
  • a primer coating liquid Inversely synthesized aliphatic polyurethane dispersion and the crosslinking agent are mixed with the polymeric binder dispersion in appropriate preselected ratios to form a primer coating liquid.
  • the coating liquid can be applied to a surface of the base layer by conventional coating methods such as dip coating, doctoring, spraying, rod coating and the like. Rod coating is preferred.
  • the primer coating liquid is dried by heating and low humidity ventilation to remove liquid dispersing medium (mainly water), and leave a solid content of the primer layer on the base polyester layer.
  • Such coating processes can be done after the biaxially oriented polyester film is made, or continuously (i.e., in line) with the biaxially oriented polyester film fabrication. The in line method is preferred to reduce the number of steps and cost of coating.
  • polyester suitable to form the base of the biaxially oriented polyester film are, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polyethylene isophthalate (IPET) and blends or co-polymers thereof.
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • PBT polybutylene terephthalate
  • IPET polyethylene isophthalate
  • a preferred polyester is PET because of its good balance of cost and performance.
  • the base layer of biaxially oriented polyester film may have a mono layer structure or a multi layer structure such as A/B, A/B/A or A/B/C.
  • A/B/A or A/B/C structures are preferred in which wherein the core layer B is a polymer layer substantially free of particles and layers A and C each independently can contain organic and/or inorganic particles.
  • Core layer B should contain no particles to achieve the preferred optical clarity of at most about 3% haze value and more preferably at most 2%.
  • the outer layers A and C may have desired slip agents such as organic and/or inorganic particles, as disclosed in US patent application 2008/0038539 hereby incorporated herein.
  • the biaxially oriented polyester film generally has a thickness of from 1 to 500 ⁇ m, preferably from 5 to 350 ⁇ m. A film thickness of 10 to 50 ⁇ m may be preferred for some applications, such as for solar window film use.
  • the biaxially oriented polyester film can be produced by any conventional method, such as sequential stretching or simultaneous stretching.
  • raw material polyester pellets and additives are fed to a melt processor, such as a mixing extruder.
  • the molten material, including the additives, is extruded through a slot die and quenched on a chill roll, in the form of a substantively amorphous film.
  • the film may then be reheated and stretched longitudinally and transversely or transversely and longitudinally, or longitudinally, transversely, and again longitudinally and/or transversely.
  • Temperatures during stretching are generally above the Tg of the film polymer by about 10 to 60° C.
  • the longitudinal stretching ratio is from 2 to 6, more preferably from 3 to 4.5.
  • the transverse stretching ratio is from 2 to 5, more preferably from 3 to 4.5.
  • any second longitudinal or transverse stretching is carried out at a ratio of from 1.1 to 5.
  • the first longitudinal stretching may also be carried out at the same time as the transverse stretching (simultaneous stretching).
  • Heat setting of the film may follow at an oven temperature of about 180 to 260° C., preferably about 220 to 250° C. The film may then be cooled and wound up.
  • the biaxially oriented polyester film may contain other additives such as, but not limited to, UV stabilizer, hydrolysis resistant agent, optical brightener, frame retardant agent, anti-oxidation agent.
  • UV stabilizer to protect the film itself and/or protect article behind the film from UV light.
  • UV light blocker UV blocking additive
  • UV stabilizer UV absorber
  • UV agent UV agent
  • Preferred UV absorbers include 2-hydroxybenzotriazoles, benzoxazinones and the triazines.
  • a more preferred UV absorber is 2,4-bis-biphenyl-6-[2-hydroxy-4-(2-ethyl-hexyloxy)phenyl]-1,3,5-triazine in terms of the weatherability and UV resistance performance.
  • the content of UV absorber may be 0.1 to 2 wt. %. Less than 0.1 wt. % is not enough to be effective, more than 2 wt. % may increase haze, yellow color, affect the mechanical properties of the film, and may create processing issues such as generating undesirable gaseous byproducts and causing migration to the surface (i.e., “blooming”) of the UV absorber.
  • the polyester film includes 0.1 to 2 wt. % UV absorber; more preferably in the range of 0.5 to 1.5%.
  • the biaxially oriented polyester film with primer of this invention can be used as a substrate on which is deposited a coating of acrylic polymer as mentioned above and seen in FIG. 2 .
  • the acrylic polymer layer is preferred to be optically clear and primarily to provide a hard, strong, impact resistant barrier against physical and chemical attack from environmental conditions to which the desired application of this invention can be exposed in service. That is, such protective layer reduces damage to the film from scratching, denting, moisture, atmospheric-borne contaminants, dirt and permits wash-and-wipe cleaning of the exposed film surface.
  • the preferred thickness of the acrylic polymer layer is 2 to 5 ⁇ m. Coating layer thickness exceeding 5 ⁇ m can adversely affect refractive index and cause iridescence. If the thickness is smaller than 2 ⁇ m, the chemical resistance properties of the acrylic polymer layer can be diminished.
  • Acrylic polymers for the protective layer of this invention have repeat units that are derivatives of acrylic acid or substituted acrylic acid. That is, the acrylic polymer is a polymer comprising polymerized units of the following formula (I)
  • acrylic polymers include polymethyl methacrylate, polyethyl methacrylate, polybutyl methacrylate, polyglycidyl methacrylate, polyhydroxyethyl methacrylate, polymethyl acrylate, polyethyl acrylate, polybutyl acrylate, polyglycidyl acrylate, polyhydroxyethyl acrylate and mixtures of these.
  • a protective layer of predominantly acrylic polymer typically has a refractive index of at most about 1.54, and frequently about 1.48 to about 1.54.
  • the acrylic polymer layer can include functional additives for specific purposes. Typical additives include antioxidants, impact resistance modifiers, surfactants, light blocking additives and the like. Preferably the acrylic layer for the desired application such as solar control films contain light blocking additives, particularly UV light blocking materials. The additives are usually present in minor quantities to avoid degrading optical clarity of the acrylic polymer layer. Typically the acrylic polymer layer contains a total of less than about 1 wt % of additives.
  • UV light blocking is a significant utility for coated polyester base solar control films.
  • PET which is a most desired polyester, alone does not resist transmission of ultraviolet (“UV”) light very well.
  • UV light blocking is typically improved by placing a coat of an effective UV light blocking material on a PET core layer of a composite film.
  • An example of such a material is a polymeric coating, for example, a hard coat such as an acrylic polymer that contains a uniformly dispersed UV light blocking composition.
  • the hard coat also physically protects the PET base layer with enhanced impact resistance, abrasion resistance and like properties that lower the risk of damage from denting, scratching and similar other environmental assaults.
  • the acrylic polymer layer includes UV light blocking materials.
  • the acrylic polymer layer generally comprises greater than about 60 wt. %, preferably greater than about 80 wt. %, more preferably, greater than about 95 wt. %, and most preferably greater than about 98 wt. % of an acrylic polymer and 0 to about 2 wt % preferably about 0.05-1 wt. %, more preferably about 0.1-0.5 wt. %, and most preferably about 0.2-0.4 wt. % of ultraviolet light blocking component.
  • the acrylic polymer can be applied to the primer layer from a solution of the acrylic polymer dissolved in organic solvent. Although the organic solvent is substantially completely removed from the acrylic polymer after lamination, trace amounts of solvent can remain in the acrylic polymer layer. Not uncommonly, the compositions in the primer layer are soluble in organic media. Over time, the very slight but finite residual solvent in adjacent acrylic polymer layer can weaken the primer layer. After exposure to heat and moisture under environmental service conditions, cracking and flaking off of the weakened acrylic polymer layer can occur. A system for adhering acrylic polymer layer applied from organic solvent media onto optically clear solar control films is much needed in the industry. Therefore, superior organic solvent resistance of the primer layer is also desired and is achieved by crosslinking agent mentioned above.
  • the acrylic polymer layer can be laminated to the biaxially oriented polyester film by various known methods.
  • laminate is used herein to mean the generic permanent joining of layers to form a composite structure and is not limited to any specific method.
  • the acrylic polymer layer can be preformed as a sheet and laminated onto the primer layer using heat and pressure.
  • Acrylic polymer can also be extruded onto the primer layer.
  • the acrylic polymer can be deposited onto the primer layer from a solution. Examples of solution application methods include doctoring, spraying, painting, dipping, and rod coating techniques. Following application of solution, the solvent is removed by conventional techniques such as heat and/or vacuum treatments.
  • a preferred material for making the acrylic polymer layer of this invention is an acrylic polymer with a UV cure intiator solution in methyl ethyl ketone and isopropyl alcohol solvent.
  • the cure initiator is one which can be activated by exposure to UV radiation.
  • the solvent is removed to leave a dry, e.g. hard coat of the acrylic polymer for the solar control film or display film such as touch screen.
  • a dry acrylic polymer layer e.g. hard coat of the acrylic polymer for the solar control film or display film such as touch screen.
  • the primer according to this invention can withstand the solubilizing effect of the presence of such trace residual solvent. It is thus able to create a durable and strong bond between the acrylic polymer layer and the polyester base layer. Consequently, the acrylic polymer layer will resist cracking, chipping, flaking and peeling from the base layer for extended duration.
  • Optically clear biaxially oriented polyester film comprising an anti-iridescent primer layer comprising, (A) polymeric binder as a major component of the primer layer, (B) 0.1-1.5 wt. % of inversely synthesized aliphatic polyurethane particle as iridescent reducing component, and (C) at least one crosslinking agent, wherein, the haze of the polyester film is 4% or less.
  • optically clear biaxially oriented polyester film of contemplated embodiment 1. which further comprises at least one UV absorber.
  • optically clear biaxially oriented polyester film of contemplated embodiment 1. for a window film, optical, display, label or photo voltaic application.
  • Haze of films was measured according to ASTM D1003 that determines the percent of transmitted light scattered at more than 2.5° from the incident light.
  • a suitable instrument to measure haze is GARDNER HAZE-GARD PLUS No. 4725 hazemeter (BYK-Gardner USA).
  • a haze value of 3% or less is considered acceptable, and 2% or less is preferred.
  • Samples of primer layer-coated base layer composite films were coated with an acrylic polymer layer.
  • a solution of acrylic polymer composition with a UV cure initiator in methyl ethyl ketone was drawn onto the composite film sample with a No. 2.5 mayer coating rod.
  • the solution coated composite film was passed at a rate of 0.25 m/s (50 ft/min.) through a field of ultraviolet light radiation of 620,000 Watts/m 2 (400 Watts per square inch) to cure and thereby solidfy the acrylic polymer composition.
  • the coated film was taped to a black & white lanetta card (9A). Then the surface of the hard coating was visually inspected under fluorescent lamp illumination and rated according to the scale below.
  • a 12.7 cm ⁇ 25.4 cm sample of composite film was coated with an acrylic polymer layer as described in the Anti-Iridescent Appearance test method, above.
  • the acrylic polymer layer-coated sample was submerged in boiling water (100° C.) for 5 minutes. Thereafter the surface of the film was visually inspected and rated according to the same scale as in the Spray Test for Acrylic polymer layer adhesion.
  • a 12.7cm ⁇ 25.4 cm sample of composite film was coated with an acrylic polymer layer as described in the Anti-Iridescent Appearance test method, above.
  • the acrylic polymer layer surface of the sample was pressed against Scotch Brand 810 adhesive tape to adhere the sample to the tape.
  • the tape was peeled away rapidly from the tape in directions perpendicular and parallel to the tape.
  • the sample and tape were visually inspected for transfer of hard coat acrylic polymer layer to the tape. The sample failed the test if any of the acrylic polymer layer transferred to the tape.
  • MB-A through MB-D of additives were prepared by individually blending additive components with polyethylene terephthalate in the proportions shown in Table 1.
  • MB-A, MB-B and MB-C were produced by adding the additive components to the reaction mass during polymerization of the PET. After synthesis, the PET with additive masterbatch compositions were pelletized.
  • MB-D was made by charging the additive with PET pellets (0.65 inherent viscosity) to a twin screw extruder in which the masterbatch composition was melt blended and then pelletized.
  • An outer layer composition for a polyester base layer film was made by mixing the masterbatch pellets with PET pellets of inherent viscosity 0.6 in the proportions shown in Table 2. The combination of pellets was dried to less than 100 ppm moisture content then melt-blended in an extruder.
  • a core layer was formed by mixing 4 wt. % of MB-D pellets and 96 wt. % PET (inherent viscosity 0.65) pellets, drying the mixture to less than 100 ppm moisture content, then melt-blending the dried pellet mixture in an extruder.
  • the outer layer and core layer melt streams were then continuously co-extruded at a temperature of 285° C. through a rectangular joining zone to form an A/B/A multi-layered melt structure.
  • the multi-layered melt curtain was quenched on a casting drum at 20° C. to form a base layer film.
  • the film was oriented in the machine direction by stretching to 3.3 times original length at 95° C. with a roller stretcher.
  • a liquid primer composition was formed by combining and blending to uniform composition 19.3 parts weight per hundred (“pph”) of a polyester binder dispersion, 0.04 pph of a leveling surfactant, 0.08 pph of an antifoam/leveling surfactant, 0.14 pph of an aqueous silica particle dispersion, and 2.62 pph of an aqueous crosslinking agent dispersion with 76.7 pph deionized water.
  • the polyester binder dispersion was a 30 wt % solids polyester particle dispersion in 2% propanol, aqueous solution (Eastek® 1200, Eastman Chemicals Company, Kingsport, Tenn.).
  • the leveling surfactant was an ethoxylated acetylenic diol (Surfonyl 440), and the antifoam/leveling surfactant was an ethoxylated acetylenic diol (Surfonyl 420).
  • the silica particle dispersion was a 20 wt % aqueous dispersion of synthetic amorphous silica particles (Grace 703A, W. R. Grace Co.).
  • the crosslinking agent was a 45 wt % aqueous dispersion of polycarbodiimide (Solucote XL1, (DSM NeoResins B.V., Waalwijk, Netherlands).
  • the liquid primer composition was coated with a Mayer rod coater onto one side of the base layer film.
  • the primer solution was deposited at a rate of about 1.4 g/m 2 of base layer area that was calculated as effective to produce a primer layer of basis weight of 0.10 g/m 2 , 0.1 ⁇ m thickness and 97.9 wt. % crosslinked polyester after drying.
  • the wet coated film was transported through an oven, preheated at 110° C., and oriented in the transverse direction to 4.0 times original width at 110° C.
  • the composite film was heat-set at 236° C. and relaxed (5%) using a chain driven stretcher.
  • the completed film was then wound up.
  • the biaxially oriented polyester film had an A/B/A thickness of 1.5/47/1.5 ⁇ m.
  • the film was aged seven days at ambient temperature for full crosslinking to occur.
  • a methyl ethyl ketone (MEK) based, acrylic hard coat containing a UV cure inflator was drawn onto the primed surface of the substrate polyester composite film above with a size No. 2.5 Mayer coating rod.
  • the solution coated composite film was passed at a rate of 0.25 m/s (50 ft/min.) through a field of ultraviolet light radiation of 620,000 Watts/m 2 (400 Watts per square inch). The radiation exposure caused the crosslinking agent to crosslink the polyester binder while volatizing the MEK from the solution to produce an acrylic polymer coated polyester film (having a dry hard coat of acrylic polymer laminated onto the base polyester film above).
  • Comparative Example 1 The procedure of Comparative Example 1 was repeated except that the liquid mixture composition for the primer layer consisted of 19.267 pph polyester primer dispersion, 0.04 pph of leveling surfactant, 0.081 pph of antifoam/leveling surfactant, 0.144 pph of aqueous silica particle dispersion, 2.615 pph of aqueous crosslinking agent dispersion and 0.329 pph aqueous polyurethane particle dispersion combined with 76.455 pph deionized water.
  • the liquid mixture composition for the primer layer consisted of 19.267 pph polyester primer dispersion, 0.04 pph of leveling surfactant, 0.081 pph of antifoam/leveling surfactant, 0.144 pph of aqueous silica particle dispersion, 2.615 pph of aqueous crosslinking agent dispersion and 0.329 pph aqueous polyurethane particle dispersion combined with 76.455 pp
  • the aqueous polyurethane dispersion was a 32 wt % solids dispersion of particles less than about 100 nm size of inversely synthesized aliphatic polyurethane (Neorez R1010, DSM NeoResins B.V., Waalwijk, Netherlands).
  • the primer layer drying conditions were same as in Comparative Example 1.
  • the dry primer layer basis weight was again about 0.10 g/m 2 and dry primer layer thickness was about 0.1 ⁇ m.
  • Composition of the dry primer layer was about 96.5 wt % crosslinked polyester and about 1.5 wt % of the inversely synthesized aliphatic polyurethane particles dispersed therein.
  • Example 2 In Comp. Ex. 3, the procedure of Example 2 was repeated except that the content of the polyurethane particle in the primer layer was 9.0 wt %. In Comp. Ex. 4, the procedure of Example 2 was again repeated except that the content of the polyurethane particle in the primer layer was 0.22 wt %.
  • Example 2 The procedure of Example 2 was repeated except that primer solution was deposited onto the base layer at about 2.8 g/m 2 rate such that the primer thickness after drying was 0.2 ⁇ m. Analytical results shown in Table 3 indicate that excessive thickness of the primer layer adversely affects optical clarity although iridescence was canceled.
  • Example 2 For Comp. Ex. 6, the procedure of Example 2 was repeated except that a glyoxal crosslinking agent (Freechem® 40DL from Emerald Performance Materials) was substituted for the carbodiimide crosslinking agent.
  • Freechem 40DL is an aqueous solution of ethanedial which containing less than 0.2% residual acid.
  • melamine formaldehyde resin crosslinking agent Cymel® 385 Cytec Industries, Woodland Park, N.J.
  • the amounts of crosslinking agent was same as Example 2. Analytical results are shown in Table 3. They reveal that the inversely synthesized aliphatic polyurethane and primer proportions as in Ex. 2 gave satisfactory iridescence and haze properties. However, replacement of carbodiimide by other crosslinking agents gave inferior Spray and Boil adhesion performance.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Polymers & Plastics (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Laminated Bodies (AREA)
US13/337,144 2011-08-02 2011-12-25 Optically clear biaxially oriented polyester film with anti-iridescent primer layer Active 2034-06-17 US9109138B2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US13/337,144 US9109138B2 (en) 2011-08-02 2011-12-25 Optically clear biaxially oriented polyester film with anti-iridescent primer layer
JP2014524042A JP6353362B2 (ja) 2011-08-02 2012-08-01 虹色光沢防止プライマー層を備えた光学的に透明な二軸配向ポリエステルフィルム
EP12820267.8A EP2739475B1 (en) 2011-08-02 2012-08-01 Optically clear biaxially oriented polyester film with anti-iridescent primer layer
PCT/US2012/049114 WO2013019837A1 (en) 2011-08-02 2012-08-01 Optically clear biaxially oriented polyester film with anti-iridescent primer layer
US13/688,181 US20130089721A1 (en) 2011-08-02 2012-11-28 Non-iridescent film with polymeric particles in primer layer
US14/795,276 US9937525B2 (en) 2011-08-02 2015-07-09 Method of making polyester film with a reduced iridescent primer layer
US15/130,974 US10294373B2 (en) 2011-08-02 2016-04-16 Method of reducing iridescence

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161514280P 2011-08-02 2011-08-02
US13/337,144 US9109138B2 (en) 2011-08-02 2011-12-25 Optically clear biaxially oriented polyester film with anti-iridescent primer layer

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US13/688,181 Continuation-In-Part US20130089721A1 (en) 2011-08-02 2012-11-28 Non-iridescent film with polymeric particles in primer layer
US14/795,276 Division US9937525B2 (en) 2011-08-02 2015-07-09 Method of making polyester film with a reduced iridescent primer layer

Publications (2)

Publication Number Publication Date
US20130034710A1 US20130034710A1 (en) 2013-02-07
US9109138B2 true US9109138B2 (en) 2015-08-18

Family

ID=47627116

Family Applications (2)

Application Number Title Priority Date Filing Date
US13/337,144 Active 2034-06-17 US9109138B2 (en) 2011-08-02 2011-12-25 Optically clear biaxially oriented polyester film with anti-iridescent primer layer
US14/795,276 Active 2032-11-21 US9937525B2 (en) 2011-08-02 2015-07-09 Method of making polyester film with a reduced iridescent primer layer

Family Applications After (1)

Application Number Title Priority Date Filing Date
US14/795,276 Active 2032-11-21 US9937525B2 (en) 2011-08-02 2015-07-09 Method of making polyester film with a reduced iridescent primer layer

Country Status (4)

Country Link
US (2) US9109138B2 (enrdf_load_stackoverflow)
EP (1) EP2739475B1 (enrdf_load_stackoverflow)
JP (1) JP6353362B2 (enrdf_load_stackoverflow)
WO (1) WO2013019837A1 (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9937525B2 (en) 2011-08-02 2018-04-10 Toray Plastics (America), Inc. Method of making polyester film with a reduced iridescent primer layer
US10294373B2 (en) 2011-08-02 2019-05-21 Toray Plastics (America), Inc. Method of reducing iridescence
US10639873B1 (en) 2017-07-26 2020-05-05 Toray Plastics (America), Inc. Heat sealing polyester films with low coefficient of friction

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6131855B2 (ja) * 2012-08-10 2017-05-24 東レ株式会社 積層ポリエステルフィルム
EP2925521A1 (en) * 2012-11-28 2015-10-07 Toray, Plastics (America), Inc. Non-iridescent film with polymeric particles in primer layer
JP6988491B2 (ja) * 2017-01-17 2022-01-05 東レ株式会社 積層フィルムおよびその製造方法
KR102582465B1 (ko) * 2018-09-19 2023-09-25 삼성디스플레이 주식회사 표시 장치
US12404401B2 (en) 2021-08-18 2025-09-02 Toray Plastics (America), Inc. Durable printable label film

Citations (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235399A (en) 1962-09-06 1966-02-15 Du Pont Iridescent plastic coatings
US3766061A (en) 1971-09-20 1973-10-16 Du Pont Decorative iridescent compositions
US4103050A (en) 1976-08-13 1978-07-25 Scm Corporation Aqueous coil coating primer
US4177099A (en) 1975-09-02 1979-12-04 Ppg Industries, Inc. Method of bonding polyurethane sheeting to acrylic or polyurethane sheeting in production of transparent windows
US4265957A (en) 1979-11-08 1981-05-05 General Signal Corporation Multi-layered, fiberglass-reinforced floor covering systems
US4274887A (en) 1975-05-02 1981-06-23 Messerschmitt-Boelkow-Blohm Gesellschaft Mit Beschraenkter Haftung Lacquer coated metal surface
US4857366A (en) 1988-03-11 1989-08-15 Minnesota Mining And Manufacturing Company Method for obtaining adhesion of urethane sealant to a painted or glass surface
US5298312A (en) 1991-04-04 1994-03-29 Asahi Glass Company Ltd. Non-iridescent transparent product
US5316791A (en) 1993-01-21 1994-05-31 Sdc Coatings Inc. Process for improving impact resistance of coated plastic substrates
US5368943A (en) 1991-12-20 1994-11-29 Adco Products, Inc. Polyurethane block copolymer
EP0839643A1 (en) 1996-11-05 1998-05-06 Ppg Industries, Inc. Improved aircraft transparency
US5776548A (en) 1996-11-05 1998-07-07 Ppg Industries, Inc. Primer for promoting adhesion of polyurethane to a metal oxide coating
US5840429A (en) 1996-11-05 1998-11-24 Ppg Industries, Inc. Aircraft transparency
US5852514A (en) 1995-11-06 1998-12-22 Kimoto Co., Ltd. Light diffusion composite
US6018902A (en) 1997-06-27 2000-02-01 Ebsco Industries, Inc. Iridescent coating for fishing lure
US6191056B1 (en) 1999-09-20 2001-02-20 Miliken & Company Primer coating providing a metallized fabric exhibiting improved washfastness
US6200650B1 (en) 1999-05-26 2001-03-13 Ppg Industries Ohio, Inc. Processes for drying and curing primer coating compositions
US6279983B1 (en) 2000-10-30 2001-08-28 Creative Extruded Products, Inc. Method of installing automotive window molding
US20030215621A1 (en) 2002-05-20 2003-11-20 Eastman Kodak Company Acrylic films prepared by coating methods
US6706387B2 (en) 2001-08-16 2004-03-16 Toray Plastics (America), Inc. Easy handling ultraclear thermoplastic film
US6794445B2 (en) 2002-04-17 2004-09-21 Goldschmidt Ag Aqueous polysiloxane-polyurethane dispersion, its preparation and use in coating compositions
JP2004299101A (ja) 2003-03-28 2004-10-28 Toray Ind Inc 表面保護用透明積層フィルム
US6887526B1 (en) 1999-09-16 2005-05-03 Basf Coatings Ag Integrated coating method for auto body parts containing plastic parts or for cabins of passenger cars and utility vehicles as well as for their replacement parts and add-on parts
US20060252320A1 (en) 2005-05-06 2006-11-09 Cooley, Incorporated Method of forming a PVC scrim fabric laminate having superior scuff and abrasion resistance
US7150923B2 (en) 2000-10-24 2006-12-19 Goodrich Technology Corporation Chrome coating composition
US20080026209A1 (en) 2006-07-28 2008-01-31 Sunitha Grandhee Automotive panel having polyurethane primer
US20080038539A1 (en) 2006-08-08 2008-02-14 Toray Plastics (America), Inc. Lumirror Divison Anti-iridescent easy handling ultraclear thermoplastic film
US20080057297A1 (en) 2006-08-22 2008-03-06 Fujifilm Corporation Optical multi-layer sheet and image display device
US7569269B2 (en) 2004-10-06 2009-08-04 Nitto Denko Corporation Hard coat film, antireflection hard coat film, optical element and image display
US20090324956A1 (en) * 2006-06-30 2009-12-31 Toshiaki Otani Process for producing photochromic optical articles
US20100068531A1 (en) 2006-12-19 2010-03-18 Ja Eun Gu Electromagnetic wave shield with vacuum deposited metal using water dispersed polyurethane
WO2010045657A1 (en) 2008-10-17 2010-04-22 Battelle Memorial Institute Corrosion resistant primer coating
US20100239868A1 (en) 2005-09-12 2010-09-23 Toray Industries, Inc., A Corporation Of Japan Laminated Film
US20100279088A1 (en) * 2009-04-30 2010-11-04 Seiko Epson Corporation Optical Article and Method for Producing the Same
US20100316852A1 (en) 2007-12-28 2010-12-16 Condo Peter D Infrared reflecting films for solar control and other uses
WO2011000525A1 (en) * 2009-07-02 2011-01-06 Bayer Materialscience Ag Crosslinkable polyurethane dispersions

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05132636A (ja) * 1991-11-12 1993-05-28 Dainippon Ink & Chem Inc 被覆膜の形成方法
JP2004143379A (ja) * 2002-10-28 2004-05-20 Unitika Ltd 樹脂水性分散体
PL214676B1 (pl) * 2003-02-12 2013-09-30 Ngk Insulators Ltd Sposób wytwarzania porowatej ceramiki
WO2005090491A1 (en) * 2004-03-17 2005-09-29 Akzo Nobel Coatings International B.V. Effect paint
KR100885819B1 (ko) 2007-12-18 2009-02-26 제일모직주식회사 굴절률이 우수한 분지형 아크릴계 공중합체 및 그 제조방법
US20130089721A1 (en) 2011-08-02 2013-04-11 Tracy Paolilli Non-iridescent film with polymeric particles in primer layer
US9109138B2 (en) 2011-08-02 2015-08-18 Toray Plastics (America), Inc. Optically clear biaxially oriented polyester film with anti-iridescent primer layer
CN103929708A (zh) 2014-04-25 2014-07-16 瑞声光电科技(常州)有限公司 一种复合振膜的制备方法

Patent Citations (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3235399A (en) 1962-09-06 1966-02-15 Du Pont Iridescent plastic coatings
US3766061A (en) 1971-09-20 1973-10-16 Du Pont Decorative iridescent compositions
US4274887A (en) 1975-05-02 1981-06-23 Messerschmitt-Boelkow-Blohm Gesellschaft Mit Beschraenkter Haftung Lacquer coated metal surface
US4177099A (en) 1975-09-02 1979-12-04 Ppg Industries, Inc. Method of bonding polyurethane sheeting to acrylic or polyurethane sheeting in production of transparent windows
US4103050A (en) 1976-08-13 1978-07-25 Scm Corporation Aqueous coil coating primer
US4265957A (en) 1979-11-08 1981-05-05 General Signal Corporation Multi-layered, fiberglass-reinforced floor covering systems
US4857366A (en) 1988-03-11 1989-08-15 Minnesota Mining And Manufacturing Company Method for obtaining adhesion of urethane sealant to a painted or glass surface
US5298312A (en) 1991-04-04 1994-03-29 Asahi Glass Company Ltd. Non-iridescent transparent product
US5368943A (en) 1991-12-20 1994-11-29 Adco Products, Inc. Polyurethane block copolymer
US5316791A (en) 1993-01-21 1994-05-31 Sdc Coatings Inc. Process for improving impact resistance of coated plastic substrates
US5852514A (en) 1995-11-06 1998-12-22 Kimoto Co., Ltd. Light diffusion composite
EP0839643A1 (en) 1996-11-05 1998-05-06 Ppg Industries, Inc. Improved aircraft transparency
US5840429A (en) 1996-11-05 1998-11-24 Ppg Industries, Inc. Aircraft transparency
US5776548A (en) 1996-11-05 1998-07-07 Ppg Industries, Inc. Primer for promoting adhesion of polyurethane to a metal oxide coating
US6018902A (en) 1997-06-27 2000-02-01 Ebsco Industries, Inc. Iridescent coating for fishing lure
US6200650B1 (en) 1999-05-26 2001-03-13 Ppg Industries Ohio, Inc. Processes for drying and curing primer coating compositions
US6887526B1 (en) 1999-09-16 2005-05-03 Basf Coatings Ag Integrated coating method for auto body parts containing plastic parts or for cabins of passenger cars and utility vehicles as well as for their replacement parts and add-on parts
US6191056B1 (en) 1999-09-20 2001-02-20 Miliken & Company Primer coating providing a metallized fabric exhibiting improved washfastness
US7150923B2 (en) 2000-10-24 2006-12-19 Goodrich Technology Corporation Chrome coating composition
US6279983B1 (en) 2000-10-30 2001-08-28 Creative Extruded Products, Inc. Method of installing automotive window molding
US6706387B2 (en) 2001-08-16 2004-03-16 Toray Plastics (America), Inc. Easy handling ultraclear thermoplastic film
US6794445B2 (en) 2002-04-17 2004-09-21 Goldschmidt Ag Aqueous polysiloxane-polyurethane dispersion, its preparation and use in coating compositions
US20030215621A1 (en) 2002-05-20 2003-11-20 Eastman Kodak Company Acrylic films prepared by coating methods
JP2004299101A (ja) 2003-03-28 2004-10-28 Toray Ind Inc 表面保護用透明積層フィルム
US7569269B2 (en) 2004-10-06 2009-08-04 Nitto Denko Corporation Hard coat film, antireflection hard coat film, optical element and image display
US20060252320A1 (en) 2005-05-06 2006-11-09 Cooley, Incorporated Method of forming a PVC scrim fabric laminate having superior scuff and abrasion resistance
US20100239868A1 (en) 2005-09-12 2010-09-23 Toray Industries, Inc., A Corporation Of Japan Laminated Film
US20090324956A1 (en) * 2006-06-30 2009-12-31 Toshiaki Otani Process for producing photochromic optical articles
US20080026209A1 (en) 2006-07-28 2008-01-31 Sunitha Grandhee Automotive panel having polyurethane primer
US20080038539A1 (en) 2006-08-08 2008-02-14 Toray Plastics (America), Inc. Lumirror Divison Anti-iridescent easy handling ultraclear thermoplastic film
US20080057297A1 (en) 2006-08-22 2008-03-06 Fujifilm Corporation Optical multi-layer sheet and image display device
US20100068531A1 (en) 2006-12-19 2010-03-18 Ja Eun Gu Electromagnetic wave shield with vacuum deposited metal using water dispersed polyurethane
US20100316852A1 (en) 2007-12-28 2010-12-16 Condo Peter D Infrared reflecting films for solar control and other uses
WO2010045657A1 (en) 2008-10-17 2010-04-22 Battelle Memorial Institute Corrosion resistant primer coating
US20100279088A1 (en) * 2009-04-30 2010-11-04 Seiko Epson Corporation Optical Article and Method for Producing the Same
WO2011000525A1 (en) * 2009-07-02 2011-01-06 Bayer Materialscience Ag Crosslinkable polyurethane dispersions

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9937525B2 (en) 2011-08-02 2018-04-10 Toray Plastics (America), Inc. Method of making polyester film with a reduced iridescent primer layer
US10294373B2 (en) 2011-08-02 2019-05-21 Toray Plastics (America), Inc. Method of reducing iridescence
US10639873B1 (en) 2017-07-26 2020-05-05 Toray Plastics (America), Inc. Heat sealing polyester films with low coefficient of friction

Also Published As

Publication number Publication date
WO2013019837A1 (en) 2013-02-07
JP6353362B2 (ja) 2018-07-04
US20130034710A1 (en) 2013-02-07
EP2739475A4 (en) 2015-03-18
JP2014525858A (ja) 2014-10-02
EP2739475B1 (en) 2018-05-16
EP2739475A1 (en) 2014-06-11
US9937525B2 (en) 2018-04-10
US20150306629A1 (en) 2015-10-29

Similar Documents

Publication Publication Date Title
US9937525B2 (en) Method of making polyester film with a reduced iridescent primer layer
US10294373B2 (en) Method of reducing iridescence
JP5570289B2 (ja) 積層ポリエステルフィルム
CA2274774C (en) Uv protected syndiotactic polystyrene overlay films
WO2014156879A1 (ja) 偏光板及び画像表示装置
JP5005927B2 (ja) 光学用積層ポリエステルフィルム
KR101711405B1 (ko) 도포 필름
JP5520138B2 (ja) 積層ポリエステルフィルム
KR101776597B1 (ko) 도포 필름
KR20170004940A (ko) 자외선 차단 코팅 조성물 및 이를 이용한 자외선 차단 필름
EP2925521A1 (en) Non-iridescent film with polymeric particles in primer layer
KR20110051801A (ko) 공중합 폴리에스테르 수지를 포함하는 표면 레벨링성이 향상된 이축배향 폴리에스테르 이접착필름
KR20160056532A (ko) 자외선 차단 코팅 조성물 및 이를 이용한 자외선 차단 필름
JP5593627B2 (ja) 積層ポリエステルフィルムおよびその製造方法
US20170084210A1 (en) Decorative illumination ink jet recording material, decorative illumination image, method of forming the same, and decorative illumination signboard
KR102534781B1 (ko) 광학용 폴리에스테르 필름 및 이를 포함하는 적층필름
JP5506847B2 (ja) 積層ポリエステルフィルム
JP6672984B2 (ja) 光学反射フィルム、光学反射フィルムの製造方法、及び、光学反射体
JP5637921B2 (ja) 積層ポリエステルフィルム
JP5355620B2 (ja) 積層ポリエステルフィルム
WO2012144425A1 (ja) 積層ポリエステルフィルム
WO2013001946A1 (ja) 塗布フィルム

Legal Events

Date Code Title Description
AS Assignment

Owner name: TORAY PLASTICS (AMERICA), INC., RHODE ISLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:PAOLILLI, TRACY;FITCH, JOHN;REEL/FRAME:027576/0116

Effective date: 20120116

STCF Information on status: patent grant

Free format text: PATENTED CASE

CC Certificate of correction
MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 4

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 8